問題描述

我使用的是win10 64位，python2.7版本。在看《機器學習實戰》這本書的時候，出現了下面的問題。代碼如下：

# -*- coding: utf-8 -*-'''Created on Thu Apr 06 09:01:25 2017@author: ning0'''import matplotlib.pyplot as pltdecisionNode = dict(boxstyle = 'sawtooth',fc = '0.8')leafNode = dict(boxstyle = 'round4',fc = '0.8')arrow_args = dict(arrowstyle = '<-')def plotNode(nodeTxt,centerPt,parentPt,nodeType): createPlot.ax1.annotate(nodeTxt,xy = parentPt, xycoords = 'axes fraction',xytext = centerPt, textcoords = ’axes fraction’,va = ’center’, bbox = nodeType,arrowprops = arrow_args) def createPlot(): fig = plt.figure(1,facecolor=’white’) fig.clf() createPlot.ax1 = plt.subplot(111,frameon = False) plotNode(’葉節點’,(0.5,0.1),(0.1,0.5),decisionNode) plotNode(’決策節點’,(0.8,0.1),(0.3,0.8),leafNode) plt.show()

報錯信息如下：

createPlot------> createPlot()?Traceback (most recent call last): File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreinteractiveshell.py', line 2898, in run_code self.showtraceback() File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreinteractiveshell.py', line 1824, in showtraceback value, tb, tb_offset=tb_offset) File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreultratb.py', line 1406, in structured_traceback self, etype, value, tb, tb_offset, number_of_lines_of_context) File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreultratb.py', line 1323, in structured_traceback self, etype, value, elist, tb_offset, number_of_lines_of_context File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreultratb.py', line 644, in structured_traceback out_list.extend(self._format_list(elist)) File 'C:Usersning0Anaconda3envspy27libsite-packagesIPythoncoreultratb.py', line 682, in _format_list item += ’ %sn’ % line.strip()UnicodeDecodeError: ’ascii’ codec can’t decode byte 0xe5 in position 10: ordinal not in range(128)

希望有人能夠幫我解答一下這個問題。謝謝

問題解答

plotNode(u’葉節點’,(0.5,0.1),(0.1,0.5),decisionNode)， 加個u試試

我以前也遇到過，網上的方法均不能解決，最后：來源：https://my.oschina.net/u/1180...

不知道能解決你的問題嗎？

你的item不是字節碼,是Unicode.

如果用python3，這個世界就清凈許多。